Controlled synthesis of hexagonal mesostructure silica and macroporous ordered siliceous foams for VOCs adsorption

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 5695-5703 ◽  
Author(s):  
Hongning Wang ◽  
Xiao Rong ◽  
Lu Han ◽  
Mei Tang ◽  
Meihua Yu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Activated Carbon ◽  
Silica Gel ◽  
Controlled Synthesis ◽  
Removal Capacity ◽  
Temperature Controlled

The Temperature-controlled phase transformation from hexagonal mesostructure silica (HMS) to macroporous ordered siliceous foams (MOSF). HMS and MOSF exhibit higher VOCs removal capacity and recyclability compared to silica gel and activated carbon.

Synthesis of hollow organosiliceous spheres for volatile organic compound removal

2014 ◽  
Vol 2 (45) ◽  
pp. 19298-19307 ◽  
Author(s):  
Hongning Wang ◽  
Mei Tang ◽  
Lu Han ◽  
Jianyu Cao ◽  
Zhihui Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Vapor ◽  
Organic Compound ◽  
Adsorption Capacity ◽  
Silica Gel ◽  
Volatile Organic Compound ◽  
Water Vapor Adsorption ◽  
Voc Removal ◽  
Removal Capacity ◽  
Volatile Organic

Synthesized mesoporous hollow organosiliceous spheres exhibit the smallest water vapor adsorption capacity, the largest VOC removal capacity and the highest recyclability as compared to commercial silica gel and activated carbon.

Experiment Study of Small Composite Desiccant Wheel Based on Ceramic

2012 ◽  
Vol 614-615 ◽  
pp. 665-669
Author(s):  
Chun Xia Jia
Keyword(s):  
Silica Gel ◽  
Residential Building ◽  
Experimental Results ◽  
Moisture Removal ◽  
Experiment Study ◽  
Desiccant Wheel ◽  
Rotating Speed ◽  
Removal Capacity

Small composite desiccant wheels based on ceramic are designed and developed. The experiments test the influence of the rotating speed and wheel thickness on the dehumidification performance. Furthermore the dehumidification performance of the composite desiccant wheel is compared with the silica gel wheel. The experimental results show increasing the rotating speed of the desiccant wheel can improve the moisture removal capacity. Compared with the silica gel wheel, the moisture removal amounts of the thin composite desiccant wheel are about similar with that of the thick silica gel wheel. It is further indentified that the new composite desiccant wheel can reduce the size of the dehumidifier and has more potential for residential building field.

Low-temperature-controlled synthesis and growth mechanism of AlN whiskers

2015 ◽  
Vol 19 (sup2) ◽  
pp. S2-108-S2-112 ◽  
Author(s):  
B. Peng ◽  
G. B. Qiu ◽  
C. S. Yue ◽  
X. M. Hou ◽  
L. Z. Gou ◽  
...  
Keyword(s):  
Low Temperature ◽  
Growth Mechanism ◽  
Controlled Synthesis ◽  
Temperature Controlled

Study on the Anatase to Rutile Phase Transformation and Controlled Synthesis of Rutile Nanocrystals with the Assistance of Ionic Liquid

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 10294-10302 ◽  
Author(s):  
Kunlun Ding ◽  
Zhenjiang Miao ◽  
Baoji Hu ◽  
Guimin An ◽  
Zhenyu Sun ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Phase Transformation ◽  
Rutile Phase ◽  
Controlled Synthesis

Fly Ash for Colour Removal from Synthetic Dye Solutions

1999 ◽  
Vol 34 (3) ◽  
pp. 505-518 ◽  
Author(s):  
T. Viraraghavan ◽  
K.R. Ramakrishna
Keyword(s):  
Activated Carbon ◽  
Fly Ash ◽  
Granular Activated Carbon ◽  
Particle Sizes ◽  
Colour Removal ◽  
First Order ◽  
Synthetic Dye ◽  
Removal Capacity ◽  
Acid Blue ◽  
Dye Solutions

Abstract Fly ash was investigated for its ability to adsorb dyes from aqueous solutions. Batch pH, kinetic and isotherm studies were performed on a laboratory scale with synthetic dye solutions made up of four different commercial grade dyes. Fly ash samples with differing compositions and particle sizes were employed to understand the effect of fly ash composition and particle size on their dye removal capacity. The first-order rate equation by Lagergren was tested on the kinetic data, and isotherm data was analyzed for possible agreement with the Langmuir and Freundlich adsorption isotherm equations. The removal capacity of fly ash for the different dyes was compared with that of granular activated carbon under identical conditions. Results showed that fly ash exhibited reasonably good dye removals for Basic Blue 9, Acid Blue 29 and Acid Red 91, while the removals by fly ash exceeded that of granular activated carbon for Disperse Red 1. Lime content in fly ash seemed to influence dye adsorption to a significant degree — better adsorption was observed at lower particle sizes because of the increased external surface area available for adsorption. Acid Blue 29 adsorption by fly ash provided the best fit for the Lagergren first-order plot. Because high pH and heavy metals (leached from fly ash) in the treated wastewater may exceed the limits set in municipal sewer-use bylaws, engineering and economic feasibility assessment should include these aspects when considering fly ash for colour removal.

scholarly journals Optimisation of durian peel based activated carbon preparation conditions for dye removal

2013 ◽  
Vol 16 (1) ◽  
pp. 22-31
Author(s):  
Phung Thi Kim Le ◽  
Kien Anh Le
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Area ◽  
Dye Removal ◽  
Activated Carbons ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Impregnation Ratio ◽  
Carbon Production ◽  
Removal Capacity

Agricultural wastes are considered to be a very important feedstock for activated carbon production as they are renewable sources and low cost materials. This study present the optimize conditions for preparation of durian peel activated carbon (DPAC) for removal of methylene blue (MB) from synthetic effluents. The effects of carbonization temperature (from 673K to 923K) and impregnation ratio (from 0.2 to 1.0) with potassium hydroxide KOH on the yield, surface area and the dye adsorbed capacity of the activated carbons were investigated. The dye removal capacity was evaluated with methylene blue. In comparison with the commercial grade carbons, the activated carbons from durian peel showed considerably higher surface area especially in the suitable temperate and impregnation ratio of activated carbon production. Methylene blue removal capacity appeared to be comparable to commercial products; it shows the potential of durian peel as a biomass source to produce adsorbents for waste water treatment and other application. Optimize condition for preparation of DPAC determined by using response surface methodology was at temperature 760 K and IR 1.0 which resulted the yield (51%), surface area (786 m2/g), and MB removal (172 mg/g).

Biological treatment characteristics of benzene and toluene in a biofilter packed with cylindrical activated carbon

2002 ◽  
Vol 46 (11-12) ◽  
pp. 51-56 ◽  
Author(s):  
G.-W. Li ◽  
H.-Y. Hu ◽  
J.-M. Hao ◽  
H.-Q. Zhang
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Gas Flow ◽  
Removal Rate ◽  
Carbon Dioxide Concentration ◽  
Organic Load ◽  
Filler Materials ◽  
Removal Capacity ◽  
Bacillus Spore ◽  
Maximum Removal

The biodegradation of toluene and benzene in a biofilter using cylindrical activated carbon as the filler materials was studied. Three gas flow rates, i.e. 0.25, 0.50 and 0.75 m3/h, corresponding to empty bed gas residence of 75, 37.5 and 25 s, respectively, and total organic load lower than 400 g/m3.h were tested. The biofilter proved to be highly efficient in biodegradation of toluene and benzene, and toluene was more easily degraded than benzene. When each inlet load was lower than 150 g/m3.h, removal rate increased with inlet load and reached a maximum, which was 150 and 120 g/m−3.h for toluene and benzene, respectively. For inlet load higher than the maximum removal capacity conditions, the removal rate decreased with inlet load. Carbon dioxide concentration profile through the biofilter revealed that the mass ratios of carbon dioxide produced to the toluene and benzene removed were 2.15 g(CO2)/g(toluene) and 1.67 g(CO2)/g(benzene), which furthermore, confirmed the biodegradation performance in biofilter. The observation of biotic community demonstrated that the microbes consisted of bacillus, spore bacillus and fungi, of which the spore bacillus was dominant.

A method to circumvent the lot number of activated carbon affecting the performance of activated carbon silica gel columns used for cleanup of blood samples for analysis of 29 hazardous organochlorine compounds

The Analyst ◽  
2005 ◽  
Vol 130 (4) ◽  
pp. 557 ◽  
Author(s):  
Kimiyoshi Kitamura ◽  
Yoshikatsu Takazawa ◽  
Shunji Hashimoto ◽  
Jae-Won ChoiPresent address: Organic Chemis ◽  
Hiroyasu Ito ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Silica Gel ◽  
Organochlorine Compounds ◽  
Blood Samples
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